mirror of
https://github.com/Ralim/IronOS.git
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129 lines
3.8 KiB
C++
129 lines
3.8 KiB
C++
/*
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* WS2812.h
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*
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* Created on: 2 May 2021
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* Author: Ralim
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*/
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#include "Setup.h"
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#include <stddef.h>
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#include <string.h>
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#include <stdint.h>
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#include "Pins.h"
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#ifndef CORE_DRIVERS_WS2812_H_
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#define CORE_DRIVERS_WS2812_H_
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#ifndef WS2812_LED_CHANNEL_COUNT
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#define WS2812_LED_CHANNEL_COUNT 3
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#endif
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#define WS2812_RAW_BYTES_PER_LED (WS2812_LED_CHANNEL_COUNT * 8)
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template<uint32_t LED_GPIO, uint16_t LED_PIN, int LED_COUNT> class WS2812 {
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private:
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uint8_t leds_colors[WS2812_LED_CHANNEL_COUNT * LED_COUNT];
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public:
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void led_update() {
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__disable_irq();
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// Bitbang it out as our cpu irq latency is too high
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for (unsigned int i = 0; i < sizeof(leds_colors); i++) {
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// Shove out MSB first
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for (int x = 0; x < 8; x++) {
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((GPIO_TypeDef*) WS2812_GPIO_Port)->BSRR = WS2812_Pin;
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if ((leds_colors[i] & (1 << (7 - x))) == (1 << (7 - x))) {
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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} else {
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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}
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((GPIO_TypeDef*) WS2812_GPIO_Port)->BSRR = (uint32_t) WS2812_Pin
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<< 16u;
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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__asm__ __volatile__("nop");
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}
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}
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__enable_irq();
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}
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void init(void) {
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memset(leds_colors, 0, sizeof(leds_colors));
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}
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void led_set_color(size_t index, uint8_t r, uint8_t g, uint8_t b) {
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 0] = g;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 1] = r;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 2] = b;
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}
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void led_set_color_all(uint8_t r, uint8_t g, uint8_t b) {
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for (int index = 0; index < LED_COUNT; index++) {
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 0] = g;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 1] = r;
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leds_colors[index * WS2812_LED_CHANNEL_COUNT + 2] = b;
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}
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}
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};
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#endif /* CORE_DRIVERS_WS2812_H_ */
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